diff --git a/source/2/2.2/2.2.4/libreoffice_impress.rst b/source/2/2.2/2.2.4/libreoffice_impress.rst
index 24f7568e..2712aa59 100644
--- a/source/2/2.2/2.2.4/libreoffice_impress.rst
+++ b/source/2/2.2/2.2.4/libreoffice_impress.rst
@@ -1,4 +1,4 @@
-Chapter 2.2.3 LibreOffice Impress
+Chapter 2.2.4 LibreOffice Impress
 =================================
 
 LibreOffice Impress is the program to present presentations on Lubuntu.
diff --git a/source/2/2.2/2.2.5/libreoffice_math.rst b/source/2/2.2/2.2.5/libreoffice_math.rst
index cfd407c4..c7a18cd1 100644
--- a/source/2/2.2/2.2.5/libreoffice_math.rst
+++ b/source/2/2.2/2.2.5/libreoffice_math.rst
@@ -1,4 +1,4 @@
-Chapter 2.2.4 LibreOffice Math
+Chapter 2.2.5 LibreOffice Math
 ==============================
 
 LibreOffice Math is the default application for typesetting equations on Lubuntu.
diff --git a/source/2/2.2/2.2.6/libreoffice_writer.rst b/source/2/2.2/2.2.6/libreoffice_writer.rst
index f8cd5d2d..e81bc209 100644
--- a/source/2/2.2/2.2.6/libreoffice_writer.rst
+++ b/source/2/2.2/2.2.6/libreoffice_writer.rst
@@ -1,4 +1,4 @@
-Chapter 2.2.5 LibreOffice Writer
+Chapter 2.2.6 LibreOffice Writer
 ================================
 
 LibreOffice Writer is the default word processing application on Lubuntu.
diff --git a/source/2/2.2/2.2.7/qpdfview.rst b/source/2/2.2/2.2.7/qpdfview.rst
index 5b5392f1..6879707d 100644
--- a/source/2/2.2/2.2.7/qpdfview.rst
+++ b/source/2/2.2/2.2.7/qpdfview.rst
@@ -1,4 +1,4 @@
-Chapter 2.2.6 qpdfview
+Chapter 2.2.7 qpdfview
 ======================
 
 qpdfview is the default PDF viewer for Lubuntu.